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Denver Mint records scanned at the National Archives (NARA) in Denver - covering the period 1897 - 1960. Record group 104, Sequence 23. Box 5, folder 2. Folder 2 title: “Metallurgy of Zinc & Cadmum.” Courtesy of John Graffeo.
Text lost due to a tight binding, gluing, and the general condition in the original.
This book is available with additional data at Newman Numismatic Portal.
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